What changed, she argues, was peoples' attitudes toward the accumulation of wealth.
At the beginning of the 18th century, people in the Netherlands and Britain began talking about commerce as a good thing — a novelty at that time. They gave dignity to the bourgeoisie. And that drove capitalism, giving birth to the modern world.
....It's an interesting thesis, one that rings true with me. This is an idea that I plan to explore.
What changed was the sociology. That is, what changed was the attitude of the rest of the society toward businesspeople, and with that new attitude came a change in government policy. It was suddenly all right — most clearly in the most bourgeois country on earth, the U.S.A. — to get rich and to innovate.
You can read an interview with the author here.